<<Disclaimer: Verify this information before applying it to your situation.>> I received many messages of outrage over the barium story. It is true, there is no company in the US that makes it without the wheat or sorbitol. Some said to take it and suffer the consequences if you needed the test so badly. Others said, "No way, don't take the test.". Well, after a whole day of sitting on pins and needles the radiologist's girl, armed with the knowledge I gave her, finally returned my call. The radiologist agreed to do it without the barium. He felt the plain barium sulfate USP would be a waste of time. I am also having it done without IV contrast as I am allergic to shell fish. I have had ct scans every six months for 6 yrs now without it and the thoracic surgeon has been satisfied. I know you can't see lymph nodes without contrast, but this will have to suffice. Sometimes you have to do the best you can with what you have. If anyone wants to get the plain barium sulfate USP, you can call Stokes Pharmacy or Spectrum Chemical Mfg. Corp at 1-800-772-8796 in the US. For Canadian members, you can get it at EZ PAQUE 1-800-544-4624. Sorry the information could not have a more positive note. Thanks to those who replied. Rosalie (NJ)